BoilerFaultCodesYour boiler has detected a problem with the sensor that monitors the temperature of the exhaust gases, causing the system to shut down for safety.
Book a Gas Safe engineer within 24–48 hours. Your boiler may be unsafe or could break down completely if left.
Technical description: Flue NTC sensor fault
What causes this fault?
This fault occurs when the internal safety sensor detects that the exhaust gases are either too hot or the sensor itself has developed an electrical failure. The most common reason is a build-up of debris or heat damage within the sensor, preventing it from sending a reliable signal to the main control board.
Engineer required
This fault requires a Gas Safe registered engineer. Do not attempt gas-related repairs yourself.
Find a Gas Safe engineer
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A boiler cover plan would cover faults like E28 — no call-out fees, no surprises.
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